Only thing that worries me about Loot 2.0 and no ah, is crafting mats and gems. I played the console version, gear drops were great, but crafting a marquise gem required getting lucky on patterns, and farming gems forever. Gotten used to just buying stacks of mats on the ah and crafting the archon sets, or getting gems easily.
Yeah my hope is they either reduce the upgrading cost (2 rather than 3 is plenty) or actually have higher level gems have a chance of dropping in game.